Jack is the third child for the pair, who also have a daughter named Pearl, 5, and Lucille, 1.

When Maya joins her castmates on the set of "Up All Night" it will be one big happy baby-friendly family. Co-star Christina Applegate gave birth to her first child, daughter Sadie, back in January. Meanwhile Will Arnett and his wife Amy Poehler welcomed their second baby – a little boy named Abel, back in August.